Never change (or delete) a period which contains data--or any period before it.

If you have transactions in the period March 2018, you can only change periods April 2018 and after.

For example, you are currently using monthly Periods (default) and you want to change to a weekly basis.

First, run a report to view the latest transactions. For this example, it would March 29, 2018. Since the current periods are monthly, that means only periods after March 30, 2018 can be updated (deleted/added).

Rule #2 - Leave extra periods at the beginning

You must have at least 6 periods prior to the first transaction date (for reports) and for the prior period balance.

Therefore, if you plan on importing data starting January 1, 2018 - your first period (if months), should be July 2017.

How to change periods if you haven't imported any transactions to the account (easy)

You can either:

Manually --Select all of the periods on the right side of the above image, then click 'Delete a Period'.

--Then manually on the left side of the above image, edit the date and then click 'Add a Period'. Note: Start with the earliest period to add.

Use this form to import a list of periods. Since you're just starting out and you have no data in the account, select 'Replace'. The replace option will take care of deleting all of your current periods.

Period Import screen

How to change periods if you already have data in the account

First, determine the last period which contains data. For example, let's say that March 2018 is the last period with data in it.

Period Maintenance Screen

You can either:

Manually

--On the Period Maintenance Screen, select the periods to delete, then click 'Delete a Period'. For this example, you would only click periods April 2018 or later.

--Then manually on the left side of the above image, edit the date and then click 'Add a Period'-- adding the periods starting with the earliest period.

Importing

--Delete the periods as noted in the 'Manual' section above. Note: We need to delete the periods here (versus the earlier example), because we won't be using the 'Replace' option in the next step.